 /*******************************************************************************
  * Copyright (c) 2004, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui;

 /**
  * Extension interface to <code>IPerspectiveListener</code> which
  * adds support for listening to part-specific perspective lifecycle events.
  * For example, this allows a perspective listener to determine which view
  * is being hidden during a <code>CHANGE_VIEW_HIDE</code> event.
  * <p>
  * This interface may be implemented by clients.
  * </p>
  *
  * @see IPageService#addPerspectiveListener(IPerspectiveListener)
  * @see PerspectiveAdapter
  * @since 3.0
  */
 public interface IPerspectiveListener2 extends IPerspectiveListener {

     /**
      * Notifies this listener that a part in the given page's perspective
      * has changed in some way (for example, view show/hide, editor open/close, etc).
      *
      * @param page the workbench page containing the perspective
      * @param perspective the descriptor for the changed perspective
      * @param partRef the reference to the affected part
      * @param changeId one of the <code>CHANGE_*</code> constants on IWorkbenchPage
      */
     public void perspectiveChanged(IWorkbenchPage page,
             IPerspectiveDescriptor perspective,
             IWorkbenchPartReference partRef, String changeId);
 }

